Konica Corporation

Hitachi, Ltd.

Tsuyoshi Uchida

Masafumi Uchida

Kenji Hayashi

Hiroyuki Yamada

Hiroyuki Kozuru

Mikio Kohyama

Kunio Akimoto

Hiroshi Yamazaki

Kenji Yamane

Asao Matsushima

Meizo Shirose

Mikio Koyama

Takao Yamanouchi

Ryuji Kitani

Akira Ohira

Michiaki Ishikawa

Yuji Marukawa

Yasuko Yamauchi

Shoichiro Ishibashi

Gen Nagai

Shigenori Kohno

Yukiko Ichige

Sayuri Kushi

An electrostatic photographic image forming toner is disclosed. The toner comprises a toner particle containing a binder resin and a colorant in which the binder resin has a specific softening point of from 105 to 132&#xb0; C. and the toner particle has a hardness of from 6.0 to 24.0 mN and a circularity of from 0.92 to 0.99.

Toner particle having a hardnes of 6.0 to 24.0 mN and a circularity of 0.92 to 0.99

Blood sugar level measuring apparatus

A toner for developing an electrostatic latent image is disclosed. The toner comprises a resin, a colorant and a releasing agent or a crystalline polyester compound, and the toner has crushability index from 0.1 to 0.8. The toner is preferably produced by sat-out/fusion-adherence of a composite resin particle and a colorant particle, the composite resin particle comprises polyester compound in a portion of the composite resin particle other than outermost layer

Toner and image forming method

A toner for developing electrostatic latent image is disclosed. The toner comprises a crystalline compound, and exhibits at least one recrystallization peak during the second heating process in the DSC curve of said toner. An image forming method employing the toner is also disclosed.

Electrostatically charged image developing toner, production method of the same, and an image forming method

A toner for developing an electrostatic image comprising a resin, a colorant and a releasing agent in which the toner particles are obtained by salting out/fusion-adhering a resin particle comprising a binding resin and a releasing agent together with a colorant particle is disclosed. The toner comprises the toner particles having a variation coefficient of not more than 16% and a number variation coefficient of the number particle size distribution of not more than 27%.

Toner for developing electrostatic image and image forming method

A toner for electrophotography is disclosed. The resin binder is obtained by fusing fine resin particles comprising a crystalline material and amorphous polymer in a water-based medium. The crystalline material preferably has a melting point of 60 to 130&deg; C., a number average molecular weight of 1,500 to 15,000, and a melt viscosity at the melting point &plus;20&deg; C. of not more than 100 Pa&middot;s, and the amorphous polymer is preferably composed of a radically polymerizable monomer.

Toner and production method of the same

Eletrophotographic toner and image forming method

An electrophotographic toner is disclosed. The toner comprises

Electrophotographic toner

An electrophotographic toner is disclosed. The toner comprises a binder resin, a colorant and a mold releasing material, and the binder resin contains 8-32% by weight of 20,000-300,000 molecular weight component (MP), 12-28% by weight of high molecular weight component exceeding 300,000 (HP); that said HP content and MP content satisfy the following equation;

Electrophotographic toner with specific high, medium, and low molecullar

Disclosed is a toner, composed of at least a resin, a colorant and a releasing agent, wherein a low molecular weight polyolefine polymer synthesized by using a metallocene catalyst is employed as aforesaid releasing agent.

Toner for electrophotography

Disclosed is a toner for developing an electrostatic latent image, comprising a binder resin, a colorant and a releasing agent, wherein said toner has: (1) a storage modulus (G') having a falling starting temperature of 45.degree. to 65.degree. C., when a visco-modulus of said toner is measured by a rheometer, (2) a first inclination represented by (1/3).times.(log (.eta.'.sub.121)-log (.eta.'.sub.118)) is -0.065 to -0.035 at 120.degree. C. wherein said log (.eta.'.sub.121) represents a common logarithm of a fusion viscosity (.eta. ) of said toner at 121.degree. C., said log (.eta.'.sub.118) represents a common logarithm of a fusion viscosity (.eta. ) of said toner at 118.degree. C., and said first inclination represented by (1/3).times.(log (.eta.'.sub.121)-log (.eta.'.sub.118)) represents an inclination of a tangent at 120.degree. C., when said logarithm of said fusion viscosity (.eta. ) is plotted as a function of degree of Celsius, and (3) a second inclination represented by (1/3).times.(log (G'.sub.200)-log (G'.sub.197)) is not less than -0.025 at 200.degree. C., wherein said log (G'.sub.200) represents a common logarithm of said storage modulus (G') at 200.degree. C., said log (G'.sub.197) represents a common logarithm of said storage modulus (G') at 197.degree. C., and said second inclination represented by (1/3).times.(log (G'.sub.200)-log (G'.sub.197)) represents an inclination of a tangent at 200.degree. C., when said logarithm of said storage modulus (G') is plotted as a function of degree of Celsius.

Toner for developing an electrostatic latent image

Growing community of inventors

Hachioji, Japan

Tsuyoshi Uchida